perf clang: Fix build with Clang 9

LLVM D59377 (included in Clang 9) refactored Clang VFS construction a
bit, which broke perf clang build.  Let's fix it.

Signed-off-by: Maciej S. Szmigiero <[email protected]>
Reviewed-by: Dennis Schridde <[email protected]>
Cc: Alexander Shishkin <[email protected]>
Cc: [email protected]
Cc: Denis Pronin <[email protected]>
Cc: Jiri Olsa <[email protected]>
Cc: Mark Rutland <[email protected]>
Cc: Namhyung Kim <[email protected]>
Cc: Naohiro Aota <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Link: http://lore.kernel.org/lkml/[email protected]
Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>

Author: maciejsszmigiero

tools/perf/util/c++/clang.cpp

@@ -71,7 +71,11 @@ getModuleFromSource(llvm::opt::ArgStringList CFlags,
 	CompilerInstance Clang;
 	Clang.createDiagnostics();
 
+#if CLANG_VERSION_MAJOR < 9
 	Clang.setVirtualFileSystem(&*VFS);
+#else
+	Clang.createFileManager(&*VFS);
+#endif
 
 #if CLANG_VERSION_MAJOR < 4
 	IntrusiveRefCntPtr<CompilerInvocation> CI =